22180012 has 24 divisors (see below), whose sum is σ = 40340160. Its totient is φ = 10657920.

The previous prime is 22180009. The next prime is 22180013. The reversal of 22180012 is 21008122.

It is not an unprimeable number, because it can be changed into a prime (22180013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42312 + ... + 42832.

It is an arithmetic number, because the mean of its divisors is an integer number (1680840).

Almost surely, 2^22180012 is an apocalyptic number.

It is an amenable number.

22180012 is a deficient number, since it is larger than the sum of its proper divisors (18160148).

22180012 is a wasteful number, since it uses less digits than its factorization.

22180012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 22180012 is about 4709.5660097296. The cubic root of 22180012 is about 280.9661015410.

Adding to 22180012 its reverse (21008122), we get a palindrome (43188134).

The spelling of 22180012 in words is "twenty-two million, one hundred eighty thousand, twelve".